After searching online and experimenting with different methods, I have yet to discover a solution that suits my needs. My goal is to have the background image on my website centered, filling the entire browser screen, while also being compatible with responsive design.
Is there a simple alternative technique to achieve this, aside from using CSS3/background-size: cover? This particular method didn't work for me at all (the reason is still unclear).
To achieve the desired effect, consider utilizing the CSS property background-size: cover;
Alternatively, you can use a shorthand like this:
body {
background: url("bg.jpg") center center / cover;
}
If you're open to a solution that involves both HTML and CSS, you can mimic the behavior of background-size: cover by using an img tag.
HTML:
<body>
<div id="image-matte">
<img src="..."/>
</div>
... Page content below ...
</body>
CSS:
#image-matte {
position: fixed;
top: 0%;
left: -50%;
width: 200%;
height: 200%;
}
#image-matte img {
display: block;
margin: auto;
min-height: 50%;
min-width: 50%;
}
/* Overlay to prevent pointer interaction */
#image-matte:after {
content: '';
display: block;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
}
UPDATE: For a vertically and horizontally centered background image, create a table/table-cell relationship between the wrapper div and an inner div containing the image. Here's how the HTML and CSS would be structured:
HTML:
<div id="image-matte">
<div>
<img src="..."/>
</div>
</div>
CSS:
#image-matte {
position: fixed;
display: table;
top: -50%;
left: -50%;
width: 200%;
height: 200%;
text-align: center;
}
#image-matte div {
vertical-align: middle;
display: table-cell;
}
#image-matte img {
position: relative;
text-align: center;
min-height: 50%;
min-width: 50%;
}
/* Overlay to prevent pointer interaction */
#image-matte:after {
content: '';
display: block;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
}
See a working example here: http://jsfiddle.net/qkpvb/
To incorporate a background image that fits any screen size, you can use this HTML tag or CSS styling:
<img src="img/beach.jpg"
style="width:100%;height:100%;position:absolute;top:0;left:0;z-index:-5000;">
Check out more information on how to make background images fit any screen size here.
For optimal functionality across all web browsers, I recommend implementing this jQuery solution:
HTML
<img src='./resources/background.jpg' alt="background" id="background"/>
CSS
#background {
position: fixed;
top: 0;
left: 0;
z-index: -5000; // Sometimes I tend to go overboard (not the cleanest approach)
}
.bgwidth {
width: 100%;
}
.bgheight {
height: 100%;
}
JQUERY
$(window).load(function() {
var theWindow = $(window),
$bg = $("#background"),
aspectRatio = $bg.width() / $bg.height();
function resizeBg() {
if ( (theWindow.width() / theWindow.height()) < aspectRatio ) {
$bg.removeClass()
.addClass('bgheight');
} else {
$bg.removeClass()
.addClass('bgwidth');
}
}
theWindow.resize(resizeBg).trigger("resize");
});
This implementation ensures that your background image remains responsive and adjusts based on the browser window size.
In case the background-size: cover property doesn't work out, you can try these two CSS alternatives:
body {
background-size: 100% auto;
}
or
body {
background-size: contain;
}
Implementing either of these options on your body element alongside a background-image will help you achieve a responsive and full-screen background.
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